Final answer:
Barrier contraceptives such as condoms, diaphragms, and cervical caps do not suppress lactation, while oral contraceptives and injectable contraceptives may affect lactation. Intrauterine devices (IUDs) do not directly impact lactation.
Step-by-step explanation:
In terms of lactation, barrier contraceptives do not suppress lactation. Barrier contraceptives physically prevent the sperm from reaching the egg and do not interfere with hormone levels or lactation. Examples of barrier contraceptives include condoms, diaphragms, and cervical caps.
Oral contraceptives and injectable contraceptives, on the other hand, contain hormones that can suppress lactation. These methods work by providing constant levels of estrogen and progesterone, which inhibit ovulation and can potentially impact lactation.
Intrauterine devices (IUDs) are another type of contraceptive that does not directly affect lactation. IUDs work by preventing fertilization and implantation, and do not interfere with hormone levels or lactation.